20 minutes after the movie started, dates saw that same emergency exit door open again. >> the way that this person swung into the door, it seemed like this person was probably acting like a villain to swing into the door and walk in dressed all in black, a black cap, a black gas mask, body armor, weapon wrapped around his neck which i thought was fake. >> me and my husband, at the time, we both thought, oh, someone is pulling a prank. i hear this noise from down on my right and then i see this canister go all the way up, arch over the screen, and land about four or five rows below me. my first thought, oh, it's some kind of fireworks. >> come to find out, it was containing a toxic gas. it was hard for us to breathe. >> reporter: smoke filled the dark theater as fear swept through the sold-out crowd and then it got even worse.